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Optical properties of dynamical axion backgrounds

机译:动力轴背景的光学特性

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We discuss spectral distortions, time delays, and refraction of light in an axion or axion-plasma background. This involves solving the full set of geodesic equations associated to the system of Hamiltonian optics, allowing us to self-consistently take into account the evolution of the frequency, momentum, and position of photons. We support our arguments with analytic approximations and full numerical solutions. We also describe both nonintegrated and integrated versions of these effects, the latter of which depends on the whole history of the photon trajectory through the axion background. Remarkably, the introduction of a plasma enhances the sensitivity to axion-induced optical phenomena, allowing chiral refraction, integrated time delays, and integrated frequency shifts to occur at first order in the axion-photon coupling. This suggests a general enhancement of many axion-induced dispersive effects when the background refractive index is different from 1.
机译:我们讨论轴或轴等离子体背景中光的光谱扭曲,时间延迟和折射。 这涉及解决与Hamiltonian光学系统相关联的全套测地方程,允许我们自始终考虑光子频率,动量和位置的演变。 我们支持与分析近似和完整的数字解决方案的论点。 我们还描述了这些效果的非整治和集成版本,这是后者通过轴背景取决于光子轨迹的整个历史。 值得注意的是,引入等离子体增强了对轴轴诱导的光学现象的敏感性,允许手性折射,集成时间延迟和集成频率在轴光子耦合中的第一顺序发生。 这表明当背景折射率与1不同时,许多轴诱导的分散效应的一般提高。

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